Simply visit www.yahoo.com or www.google.com and enter "Find in a Library" (as a phrase, including quote marks) plus one or more search terms. Your returned results will include links with the prefix "Find in a Library" and the name of a library-owned item that matches your search terms.
Follow the link to the WorldCat Find in a Library interface, where you'll see information about the item -- often including a cover image. Enter your ZIP postal code beneath that information to see a list of libraries that have the item. If the library owns it, our name will appear as a link that leads directly to our Web site and the online record for the item!
Want to "Find in a Library" no matter where you are on the Web? Visit www.worldcatlibraries.org/downloads/ to install one of several browser plug-ins. You'll have always-there access to library searching, right from your browser's menu bar!